Wild!"Tigers Fighting Back"
Across Asia, the fight to save tigers is being waged on many fronts. Leading the charge are three men whose mission is to understand tigers using science. The challenge these biological detectives face is enormous: over the last century tiger numbers have plummeted by 95%. D

12:00 pm

Globe Trekker"London City Guide 1"
Jonathan begins his exploration of the city on a double-decker bus tour of famous sites.G

1:00 pm

Need to Know
JEFF GREENFIELD ANCHORS. On the first of two inauguration specials examining the advocacy group "Common Good's" proposals to end bureaucratic gridlock and get the United States moving forward, Need to Know anchor Jeff Greenfield explores why it now takes nearly four times as long to complete infrastructure projects in the United States than it did in the 1970's. By comparison, correspondent Rick Karr reports on how German political parties of every stripe are now backing a multi-billion-dollar plan that is expected to end German use of fossil fuels by 2050. D

Biz Kid$"Taking Charge of Your Financial Future"
Join the Biz Kids as they figure out where they want to be financially and make plans on how to get there. You can work on your plans and meet some new kid entrepreneurs, too. Follow along as a Biz Kid sets up his first savings account. D

Rick Steves' Europe"Iran's Historic Capitals"
Rick explores three former capitals: Persepolis and its monuments; Shiraz with tombs of nationally loved poets; and Esfahan with its extraordinary mosques.G

4:00 pm

NOVA"Ice Age Death Trap"
Contractors in late 2010, while preparing the ground for a new dam at a reservoir near Aspen, Colorado, uncover one of the largest collections of ice age bones found in one place. In May 2011, 37 experts from 18 institutions, other workers and volunteers, unearth more than 4,800 fossils and identify 20 different vertebrate animals, including American mastodon, giant bison, ground sloths, Columbian mammoths, deer, a horse and an ancient camel.G

5:00 pm

Pioneers of Television"Funny Ladies"
This episode features the first standup comediennes to appear on television - legends such as Phyllis Diller and Joan Rivers. It also looks at Lucille Ball's breakthrough on "I Love Lucy" and the sitcom stars who followed, including Mary Tyler Moore, Betty White and Marla Gibbs. The episode covers television's most enduring variety star, Carol Burnett, and features interviews with contemporary actresses including Tina Fey and Margaret Cho. D

6:00 pm

Chatsworth House
At the country estate of the 12th Duke of Devonshire, the south facade is under scaffolding for a $14 million renovation. An events manager arranges for digital retouching for photos of couples using the area for weddings. It is also the 48th Chatsworth Horticultural and Produce show when members of the 700-person staff compete with each other for trophies. Part 3 of 3G

The Abolitionists: American Experience"The Abolitionists, Part Two"
Douglass escapes slavery, eventually joining Garrison in the anti-slavery movement. Threatened with capture by his former owner, Douglass flees to England, returning to the U.S. in 1847. D

9:00 pm

Pioneers of Television"Funny Ladies"
This episode features the first standup comediennes to appear on television - legends such as Phyllis Diller and Joan Rivers. It also looks at Lucille Ball's breakthrough on "I Love Lucy" and the sitcom stars who followed, including Mary Tyler Moore, Betty White and Marla Gibbs. The episode covers television's most enduring variety star, Carol Burnett, and features interviews with contemporary actresses including Tina Fey and Margaret Cho. D

10:00 pm

Chatsworth House
At the country estate of the 12th Duke of Devonshire, the south facade is under scaffolding for a $14 million renovation. An events manager arranges for digital retouching for photos of couples using the area for weddings. It is also the 48th Chatsworth Horticultural and Produce show when members of the 700-person staff compete with each other for trophies. Part 3 of 3G